Engine starter



Aug. 25, 1925. 1,550,775

V. BEN DIX ENGINE STARTER Filed July 14. 1917 v @51u00 nto? l y f E I ld Mr gm my M 4% uw Patented Aug. 25, 1925.

UNITED STATES PATENT OFFICE.

VINCENT BENDIX, OF CHICAGO, ILLINOIS.

ENGINE STARTER.

Application filed July 14,

To all whom t may concern:

Be it known that I, VINCENT BENDIX, a citizen of the United States,residing at Chicago, in the county of Cool; and State of Illinois, haveinvented certain new and useful Improvements in Engine Starters, ofwhich the following is a specification.

My invention relates to that class of engine starter exemplified inpatents heretofore issued to me, for instance, Patent No. 1,125,935issued January 26, 1915, and No. 1,172,864 issued February 22, 1916,which starter is characterized by a prime mover, such as an electricmotor, and a transmission or drive operating on the screw shaftprinciple for transmitting the. power of the motor to a member of theengine to be started, such as the fly wheel thereof. This drive includesa driving shaft operated either directly or indirectly by the motor, anda pinion indirectly operated thereby and having relative movement, bothrotary and longitudinal with respect thereto.

The object of my invention is to provide a simple, efficient andreliable transmission or drive of a general character described and ofsomewhat dilferent construction as compared with the drives of saidpatents.

In the drawing Fig. 1, is a sectional elevation of the drive embodyingmy invention and Fig. 2 a sectional elevation on the line 2-2 of Fig. l.

Before describing in detail the selected embodiment of my invention asshown, I wish it understood that the drive may be of either the singleor double reduction type, and while have herein shown the former type, Ido not wish to be underst-ood as limiting myself thereto. Referring tothe construction illustrated, the starting motor partially shown at A isprovided with a driving shaft 1 which is here the extended armatureshaft. rlhe outer end of this shaft' is bored and tapped for a certaindistance to provide the Vinternally screw threaded/ portion 1a,receiving the screw threaded shaft 2. This screw shaft is provided witha collar 3 which may be either integral therewith or separate andsecured thereto.

The driving member or pinion 4 is loosely mounted upon the shaft 1 andhas relative movement therewith, both longitudinal and.

rotary. This pinion is adapted to mesh with the teeth 5a of the flywheel 5 of the engine to be started. The pinion and the collar 3 areoperatively connected by means of the 1917. Serial No. 180,562.

yielding driving connection which is here-v in the form of a coiledspring 6, one end of which is anchored to the collar by means of thebolt 7 and the other end of which is anchored to the collar portion 8 ofthe pinion by means of the stud 9. The pinion and screw shaft are heldin assembled position with respect to the shaft 1 in a suitable manner,as by means of a stop collar 10 secured on to the outer end of the shaft1 after the pinion has been assembled in place on that shaft.

Describing the operation o-f the drive and starting with the normalposition with the parts as shown, when the motor is operated the shaft 1is rotated with the result that the screw shaft is drawn inwardly withinthe shaft and towards the motor, and the pinion 4 thereby advanced intomesh with the fly wheel. lVhen the pinion has fully meshed with such flywheel and its longitudinal movement has been stopped by the contact ofthe collar 3 against the right hand end of the shaft 1, the pinion willpartake of the rotary movement transmitted from` the driving shaft andthrough the screw shaft, collar 3, driving spring 6 and pinion collar 8.In the event that the pinion teeth should abut the fly wheel teeth endto end, the pinion will yield by momentarily stopping, such result beingdue to the fact that although the screw shaft will continue to move tothe left, such movement will not advance the pinion for such moment, butwill be taken up by reason of the spaces between the coils of thesprings. lWhen the spring is compressed it begins to rotate the pinion,the slight movement of the pinion will bring the teeth into register andpermit the` proper meshing. i/Vhen the engine starts on its own powerthe pinion will be automatically demeshed. 5

I claim:

1. The combination of ahdriving shaft, a driven shaft supportedthereby'vand '"coperating therewith and having a longitudinal movementthereof and a rotary movement therewith, a driving` member mountedindependently of the driven shaft, andxa'dr'iving means connectedrespectively with said driven shaft and said driving member andconstituting the powg/ rl transmittingconnectioirbetwynwthe'nwinntlie'diiivg operation. f

2. The combination of a driving shaft, a driven shaft supported therebyand cooperating therewith and having a longitudinal movement thereof andaA rotary movement therewith, a drivinrf' member' loosely mounted uponsaid driving shaft, and a driving means connected respectively with saiddriven shaft and said d iving nien'iber and constituting the powertransmitting connection between them in the driving operation.

3. The Combination of a driving shaft, driven shaft supported therebyand cooperating therewith and having a longitudinal movement thereof anda rotary movement therewith, a driving member, and a yielding drivingmeans connecting between said driven shaft and said driving member andconstituting thepower and transmittiiiA neetion ltweenhenr'inth'efd vi-i-'flJ'The Combination of a drivin@1 shaft, a driven shaft supportedthereby and cooperating therewith and having a longitudinal movementthereof and a rotary movement therewith, said two shafts being in axialalignment, a driving member mounted independently of the driven shaft,and a driving connection connecting the driven shaft and the drivingmember and constituting the power transmitting Connection between themin the driving` operation.

5. The combination of a driving and a driven shaft. in axial alignmentand threaded one on the other, the de' shaft having longitudinal.movement with respect to the driving shaft amL rotary movementtherewith, a driving member loosely mounted upon said driving shaft, anddriving means connected with said driven shaft and said driving memberand constituting the power transmitting connection between them in thedriving operation.

6. The Combination of a driving andi-a driven shaft in axial alignnientand serowthreaded one on the other, the driven shaft having longitudinali'noveinent with respect to the driving` slnift and rotary movementtherewith, a driving member, a yielding driving means Connecting betweenthe driven shaft and the driving member and eonstituting the powertransm tting Connection between them in the driving operation.

7. The Combination of a driving and driven shaft in axial ali 4 nientand screwthreaded one on the other, the driven shaft having longitudinalmovement with respect to the driving shaft and `wtary movementtherewith, a driving member mounted on the driving shaft and Capable oflongitudinal movement thereof and rotary movement therewith, and drivinmeans Connected respectively with the dr fen shaft and the drivingmember and constituting the power transmitting connection between themin the driving operation.

8. The combination of a driving and a driven shaft in axial alinementand screwthreaded one on the other, the driven shaft having longitudinalmovement thereof and rotary movement therewith, a driving member mountedon the driving shaft and capaile of loirgitudinal movement thereof and fmovement therewith, and means for hitting the movements of the drivenving member.

9. The eomlgiination of a driving shaft havin@ an internallyserew-threaded bore at its o ter nd, a serew sii/aft received by saidbore, a dri member mounted on the driving!l shaft for relative movementthereof, botl lon: ial and rotary, antL also for rotary therew'lh, and adriving means d resneetively with the screw shaft .th the drivingmeuiber and constituting); the power transl itting connection betweenthem in the di: g operation.

lo. 'Ihe combination of a driving shaft l Q, serew-threaded bore at n aseiya-w shaft received by driving member mounted on the for relativemovement thereof, ndinal and rotary, and also roinent t ierewith, andmeans for 1e movements of the serew member. rlfhe eon'ihination of adrivingl shaft an internally screw-threaded bore at ts outer end, ascrew shaft received by said oore, a driving member mounted on thedriving `sha ft for rolati movement thereof, both `longitudiual andAiotarj-f, and also r0- t i d ri ving sin both lo inv inffivementtherewith, and yielding drivig means eoimeeting between the screw iaftand drii n' member.

l2. The coin. ination of a driving shaft having an internallyscrew-threaded bore at its` outer end, a Sil/aft reeeived by said lore,a driving member mounted on the .lriving sl aft for relative movementthereof both longitudinal und rotary, und also ro- 'tz lent thmfewith,and a spring driv- `weon the f-:erew-shal't and drivintly meunier.

13. The combination of a driving shaft having an internallyscrew-threaded bore at its outer end, a screw shaft ref; ived by saidbore, a pinion mounted on the shaft for relative movement thereof, bothlongitudinal and rotary, and also rotary movement thereivith, and meansfor transmitting the movements of the screw shaft to the pinion.

T he combination of a driving shaft havin an internally screw-threadedbore at its outer end, a serew shaft re'leeived by said bore, a pinionmounted on the shaft for relative movement thereof, both longitudinaland rotary, and also 'rotary movement therewith, and a yielding drivingeonneetion between the screw shaft and the pinion.

l5, The combination of a driving shaft having an internallyscrew-threaded bore at its outer end, a screw shaft received by saidlili bore, a pinion mounted on the shaft for relative movement thereof,both longitudinal and rotary, and also rotary movement therewith, and aspring forming the driving connection between the screw shaft andpinion.

16. The combination of a driving/"shaft having an internallyscrew-threadedf'bore at its outer end, a, screw shaft received by saidbore, a pinion mounted on the shaft fo-r relative movement thereof, bothlongitudinal and rotary, and also rotary movement therewith, the screwshaft having a collar at one end, and a yielding driving connectionbetween such collar and pinion.

17. The combination of a driving` sha t having an internallyscrew-threaded bor at its outer end, a screw shaft received by saidbore, a pinion mounted on the shaft for relative movement thereof, bothlongitudinal and rotary, and also rotary movement therewith, the screwshaft and the pinion each having an enlargement at one end, and ayielding driving Connection between such enlargements.

18. The combination of a drivinof/ shaft having an internallyscrew-threadedoore at its outer end, a screw shaft received by saidbore, a pinion mounted on the shaft for relative movement thereof, bothlongitudinal and rotary, and also rotary movement therewith, the screwshaft and the pinion each having an enlargement at one end, and a springconnected to said enlargements and forming the yielding drivingconnection bef tween the screw shaft and pinion.

19. The combination of a drivingv4 shaft having aninternallyscrew-threadediorte at its outer end, a screw shaft received by saidbore, a driving member mounted on the driving shaft for relativemovement thereof, both longitudinal and rotary, and also rotary movementtherewith, means for stopping the longitudinal movement of said membertowards normal position, and means for transmitting the movements fromthe screw shaft to the pinion.

20. The combination of a driving/'shaft having an internallyscreiv-threacled`-bore at its outer end, a screw shaft received by saidbore, a driving member mounted on the drivingshaft for relative movementthereof, both longitudinal and rotary, and also rotary movementtherewith, means for stopping the longitudinal movement of said membertowards normal position consisting of an enlargement on the drivingshaft in the path of movement of such member, and means for transmittingthe movements of the screw shaft to the pinion.

21. The combination of a driving shaft having an internallyscrew-threadedf-bore at its outer end, a screw shaft received by saidbore, a pinion mounted on the shaft for relative movement thereof, bothlongitudinal and rotary, and also rotary movement therewith, means forstopping the longitudinal movement of the pinion towards normalposition, and means for transmitting the movements of the screw shaft tothe pinion. 2Q.. The combination of a driving shaft having an internallyscrew-threadedbore at its outer end, a screw shaft received by saidbore, a pinion mounted on the shaft for relative movement thereof, bothlongitudinal and rotary, and also rotary movement therewith, means forstopping the longitudinal movement of the pinion towards normalposition, and` a yielding driving connection between the screw-shaft andthe pinion.

23. The combination of a driving ,shaft having an internallyscrew-threadedfbore at its outer end, a screw shaft received by saidbore, a pinion mounted on the shaft for relative movement thereof, bothlongitudinal and rotary, and also rotary movement therewith, saiddriving shaft having at its outer end an enlargement to stop the outwardlongitudinal movement of the pinion and means for transmitting movementof the screw shaft to the pinion.

24. The combination of a driving shaft and a driven shaft in axialalinement and serew-threaded/o/ne on the other for longitudinal movementof the driven shaft with respect to the driving shaft and its rotarymovement therewith, a driving member mounted on the drive shaft forrelative movement thereof and rotary movement therewith, and meansoperatively connected with said driven shaft and said member fortransmitting the movements of the driven shaft to such member.

VINCENT BENDIX.

